Quartz (Chert / Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary And Igneous
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Yellow Ocher (Iron-rich Silt/Clay)
Goethite-rich Limonite (FeO(OH)qnH2O)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Unakite Epidote-Granite
Unakite (Epidotized Granite)
metamorphic
Ptygmatic Migmatite
Migmatite (consisting of Neosome and Paleosome fractions)
metamorphic
Dalmation Stone (frequently called Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock
igneous
Graphic Granite
Graphic Granite (Granite Pegmatite)
igneous
Granite
Granite (Felsic Plutonic Rock / SiO2 + Al2O3 + K2O + Na2O + CaO + FeO + MgO)
igneous
Pink Granite
Granitoid (rich in Potassium Feldspar)
igneous
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Granite
Phaneritic Plutonic Felsic Rock (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8 + SiO2)
igneous
Fossil Shell
Invertebrate fossil (Mollusca)
fossil
Pink Granite (Glacial Cobble)
Granite (rich in Potassium Feldspar / Orthoclase)
igneous
Green Greenstone / Celadonite-bearing Metamorphic Rock
Greenschist / Celadonite / Serpentinitic pebble
metamorphic
Milky Quartz
Silicon dioxide (SiO2)
mineral
Quartz with Schorl (Black Tourmaline)
Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Ferruginous Quartz
Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions
mineral
Epidote with Unakite characteristics
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
metamorphic
Quartz Pebble (Sea Glass-like texture)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Gold in Quartz Ore
Hydrothermal Quartz with native Gold (Au)
mineral
Granite
Phaneritic plutonic rock (SiO2 typically >69%)
igneous
Banded Agate (variety of Chalcedony)
Agate (SiO2)
mineral
Shale (or Mudstone)
Clay mineral aggregate / Fine-grained siliciclastic sedimentary rock
sedimentary
Chert (Tan/Yellow variety)
Microcrystalline quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide (Fe2O3) cement
sedimentary
Shale
Mudrock / Fissile Shale
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Diorite (Porphyritic) / Granite
Plutonic Igneous Rock (Granodiorite / Diorite)
igneous
Dalmatian Stone
Dalmatian Jasper (Aplitic Perthite)
igneous
Granite
Phaneritic plutonic rock (composed mainly of SiO2, Al2O3, K2O, and Na2O)
igneous
Granite
Granite (Plutonic Igneous Rock)
igneous
Porphyry (Polished Pebble)
Porphyritic Rhyolite / Andesite
igneous
Chert (Jasper/Opaline variety)
Silicon Dioxide (SiO2)
sedimentary
Granite Glacial Erratic
Granite (Phaneritic Quartz-Feldspar Plutonic Rock)
igneous
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
igneous
Dalmatian Jasper
Peralkaline rock with Tourmaline spots
igneous
River Pebbles (including Granite and Basalt)
Mixed Igneous Rocks (Granite, Basalt)
igneous
Granite
Granite (a plutonic igneous rock)
Igneous
Knightia Fossil in Limestone
Knightia eocaena in micritic limestone
sedimentary